40147990 has 16 divisors (see below), whose sum is σ = 72429552. Its totient is φ = 16022944.

The previous prime is 40147957. The next prime is 40147993. The reversal of 40147990 is 9974104.

It is a super-2 number, since 2×40147990² = 3223722202080200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40147993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (4526847).

Almost surely, 2^40147990 is an apocalyptic number.

40147990 is a deficient number, since it is larger than the sum of its proper divisors (32281562).

40147990 is a wasteful number, since it uses less digits than its factorization.

40147990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9071.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40147990 is about 6336.2441556493. The cubic root of 40147990 is about 342.4164358267.

The spelling of 40147990 in words is "forty million, one hundred forty-seven thousand, nine hundred ninety".